The Development of a High-Concentration Oxygenated Water Generator Based on Nanobubbles and Its Application

Ning Zhu, Minyu Li, Kohei Shibata
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Abstract

: Water with a high concentration of oxygen is needed for the aquaculture industry in Japan. In the current study, the pressurized dissolution method was employed to generate high-concentration oxygenated water (HCOW) by producing oxygen nanobubbles in the water. In order to investigate factors such as temperature, geometric conditions, and their influence on the oxygen concentration, a special nanobubble generator was improved by changing the number and the diameter of the holes of the perforated plate in this study. Then, an experimental system where oxygen and water were separately introduced inside the proposed nanobubble generator was designed. The dissolved oxygen concentration was measured under different conditions. Finally, the produced HCOW was used to cultivate a mini-sunflower. Through a series of experiments, it was found that with the improved perforated plate, the dissolved oxygen concentration was increased and the nanobubble generator reached the saturation state quickly, while the mini-sunflower cultivated with the HCOW appeared to grow larger than that with tap water.
基于纳米气泡的高浓度含氧水发生器的开发及其应用
:日本的水产养殖业需要高浓度氧水。本研究采用加压溶解法,通过在水中产生氧纳米气泡来生成高浓度含氧水(HCOW)。为了研究温度、几何条件等因素及其对氧气浓度的影响,本研究通过改变穿孔板的孔数和孔径改进了一种特殊的纳米气泡发生器。然后,设计了一个实验系统,在拟议的纳米气泡发生器内分别引入氧气和水。在不同条件下测量了溶解氧浓度。最后,产生的 HCOW 被用于培育微型太阳花。通过一系列实验发现,改进后的穿孔板提高了溶解氧浓度,纳米气泡发生器很快就达到了饱和状态,而用 HCOW 培育的微型太阳花似乎比用自来水培育的更大。
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